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INSOLE. No. 386,832.. Patented July 31, 1888.

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\UNITED STATES PATENT OFF CE.

CHARLES W. KING, OF WEST NEWTON, MASSACHUSETTS, ASSIGNOR TO CHARLES A.KING, OF NEW YORK, N. Y.

INSOLE.

SPECIFICATION forming part of Letters Patent No. 386,832, dated July31,1888.

Application filed September 2-2, 1P87. Serial No. 250,393.

To aZZ whom it may concern.-

Be it known that I, CHARLES W. KING, of \Vest Newton, county ofMiddlesex, and State of llIassachnsetts, have invented certain new anduseful lmprovementsin Insoles and Methods of Making the Same, of whichthe following isa specification, reference being had to the drawingsaccompanying and forming a part hereof, in which is shown across-section of my improved sole as it appears when two layers ofmaterial are used in its construction.

The object of my invention is the production of a cheap, flexible, anddurable insole; and it consists in an insole constructed of one or morelayers ofwoven fabric treated with shellac, in the manner hereinafterset forth.

My invention will be readily understood from the following descriptionof the method of its manufacture.

In the manufacture of my insole I use, preferably, two layers of canvasor other woven fabric of suitable strength, and I saturate this fabricin a solution consisting of gum-shellac, borax, and Water. To make thissolution of gum-shellac, the water is heated and the borax putin anddissolved. The gum shellac is then added and the borax-water is kept hotuntil the gum-sh'ellacis dissolved thereby. Instead of dissolving thegum-shellac in boraX-Water, it may, however, be dissolved in liquidammonia, which is an equivalent for the borax-wa- (No model.)

ter, in that it is a cheap solvent for the gumshellac. After the canvashas become saturated, I lay two pieces, as a I), together, and pass thembetween heated rolls, such as are employed in a calenderingmachine.After it leaves the heated rolls, I pass it between cold rolls of asimilar kind. This pressing and rolling of the saturated fabric has theetfect of filling the pores or interstices thoroughly with shellac anddrying the'shellac therein, as also drying the shellac between thelayers of fabric, causing them to adhere together sufficiently to enablethe sole to be cut and handled while it is being secured in theshoewithout separating the layers. The fabric being filled with hardenedshellac renders it sufficiently impervious to n'ioisturefor the purposesof an insole, keeps the edges from raveling or fraying while the sole isbeing handled, and gives the fabric a color similar to that of leather,which is desirable.

\Vhat I claim is An insole for boots and shoes, consisting of layers ofwoven fabric saturated or tilled and secured together with gum-shellacdissolved in horas-water or its described equivalent, substantially asset forth.

CHARLES W. KING.

Witnesses:

WM. A. MAcLEoD, ROBERT WALLAcE.

